Improvement in ventilating



y W. H; MILLS. VENTILATING-.APPARATUS- ratenteamay 30,1876.

ooooo'eaoo N.PETER8, PNDTO-LITHOGRAPH ER, WASHINGTON, D C.

UNITED STATES PATENT OFFICE.

WILLIAM H. MILLS, OF BROOKLYN, NEW YORK..

IMPROVEMENT IN VENTlLATINGLAPPARATUS.

Specication forming part of Letters Patent No. 178,018, dated May 30, 1876; application filed v April 5, 1876.

To all 'whom it may concern:

Be it known that I, WILLIAM H. MILLS, ot' the city of Brooklyn and State `oi" New York, have invented certain Improvements in Manner and Means for Ventilation of School and Audience Rooms, and dwellings, of which the following is a specication:

The object of the improvement is keeping a steady uniform passage of air through the room at an even pressure, with control ot' tem' perature,witl1out dependence on opening windows, or exposure to drafts 5 also, to provide f'or the expulsion of the efduvia that exudes from human bodies, all of which does not ascend with the velocity of heated air, being more dense in its nature, continuing mixed with the air breathed longer than exhaled hydrogen.

The means employed consist in arrangement, adaptation, and combination of known devices-an air pump, a receiving reservoir, ingress and distributing pipes, and openings `for ingress and egress of the air to and from the rooms.

In the accompanying drawings the interior 'of a basement or cellar is shown, `with the apparatus as arranged; also, the interior of a room, with provisions for ingress and egress of air.

A is the air-pump; B, the reservoir; C, the

supply-pipe for the air -pump; D, the distributing-pipes; E, the air-entrance; F, an

outlet, and G a lire place under the reservoir. Stop-cocks hare placed Where required 5 the air-pump to `work by hand or other` power, as the size ot' the rooms require; the reservoir to be constructed so as to allow, as in aV gasometer, a regulating control of the pressure ofthe air into the apartments or halls; the air to enter at the top with a pressure sufficient to cause an outflow near the oor to the outside of the building. A window lowered at the t-op, witl1`an opening much smaller than the outlet at the Iloor, would, if needed, allow all the heated air to escape. The grosser or foul air would be kept down and be carried oft' with the artificial current induced by the pressure in the reservoir through the gratings near or in the floor. The supplypipe reaches up through the partitions or Walls into open air above the roots of the buildings. The distributing-pipes are placed in the positions with openings where desired.

The air-entrances are proportioned to the area of the rooms or halls. The aerometer or reservoir can be used to purify the air by passing it through water, and can cool it by having ice on shelves in the interior; or in winter the air can be heated by the furnace beneath.

. Vhat I claim as my improvement is- The combination of arpump A, reservoir B, ingress-pipe O, and distributing-pipe D, in an apparatus for ventilation.

WILLIAM H. MILLS.

Witnesses: Y

WILLIAM GooDINe, D. H. CRAWFORD. 

